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126 lines
3.6 KiB
126 lines
3.6 KiB
package middleware
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import (
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"context"
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"fmt"
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"net/http"
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"strings"
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"time"
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"github.com/gabehf/koito/internal/db"
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"github.com/gabehf/koito/internal/logger"
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"github.com/gabehf/koito/internal/models"
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"github.com/gabehf/koito/internal/utils"
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"github.com/google/uuid"
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)
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type MiddlwareContextKey string
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const (
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UserContextKey MiddlwareContextKey = "user"
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apikeyContextKey MiddlwareContextKey = "apikeyID"
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)
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func ValidateSession(store db.DB) func(next http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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l := logger.FromContext(r.Context())
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l.Debug().Msgf("ValidateSession: Checking user authentication via session cookie")
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cookie, err := r.Cookie("koito_session")
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var sid uuid.UUID
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if err == nil {
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sid, err = uuid.Parse(cookie.Value)
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if err != nil {
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l.Err(err).Msg("ValidateSession: Could not parse UUID from session cookie")
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utils.WriteError(w, "session cookie is invalid", http.StatusUnauthorized)
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return
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}
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} else {
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l.Debug().Msgf("ValidateSession: No session cookie found; attempting API key authentication")
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utils.WriteError(w, "session cookie is missing", http.StatusUnauthorized)
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return
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}
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l.Debug().Msg("ValidateSession: Retrieved login cookie from request")
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u, err := store.GetUserBySession(r.Context(), sid)
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if err != nil {
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l.Err(fmt.Errorf("ValidateSession: %w", err)).Msg("Error accessing database")
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utils.WriteError(w, "internal server error", http.StatusInternalServerError)
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return
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}
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if u == nil {
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l.Debug().Msg("ValidateSession: No user with session id found")
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utils.WriteError(w, "unauthorized", http.StatusUnauthorized)
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return
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}
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ctx := context.WithValue(r.Context(), UserContextKey, u)
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r = r.WithContext(ctx)
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l.Debug().Msgf("ValidateSession: Refreshing session for user '%s'", u.Username)
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store.RefreshSession(r.Context(), sid, time.Now().Add(30*24*time.Hour))
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l.Debug().Msgf("ValidateSession: Refreshed session for user '%s'", u.Username)
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next.ServeHTTP(w, r)
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})
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}
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}
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func ValidateApiKey(store db.DB) func(next http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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l := logger.FromContext(ctx)
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l.Debug().Msg("ValidateApiKey: Checking if user is already authenticated")
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u := GetUserFromContext(ctx)
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if u != nil {
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l.Debug().Msg("ValidateApiKey: User is already authenticated; skipping API key authentication")
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next.ServeHTTP(w, r)
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return
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}
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authh := r.Header.Get("Authorization")
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var token string
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if strings.HasPrefix(strings.ToLower(authh), "token ") {
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token = strings.TrimSpace(authh[6:]) // strip "Token "
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} else {
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l.Error().Msg("ValidateApiKey: Authorization header must be formatted 'Token {token}'")
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utils.WriteError(w, "unauthorized", http.StatusUnauthorized)
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return
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}
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u, err := store.GetUserByApiKey(ctx, token)
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if err != nil {
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l.Err(err).Msg("Failed to get user from database using api key")
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utils.WriteError(w, "internal server error", http.StatusInternalServerError)
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return
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}
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if u == nil {
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l.Debug().Msg("Api key does not exist")
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utils.WriteError(w, "unauthorized", http.StatusUnauthorized)
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return
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}
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ctx = context.WithValue(r.Context(), UserContextKey, u)
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r = r.WithContext(ctx)
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next.ServeHTTP(w, r)
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})
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}
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}
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func GetUserFromContext(ctx context.Context) *models.User {
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user, ok := ctx.Value(UserContextKey).(*models.User)
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if !ok {
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return nil
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}
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return user
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}
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